1212601512 has 64 divisors (see below), whose sum is σ = 3089592000. Its totient is φ = 396486144.

The previous prime is 1212601501. The next prime is 1212601543. The reversal of 1212601512 is 2151062121.

It is a super-2 number, since 2×1212601512² = 2940804853809372288, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1173348 + ... + 1174380.

It is an arithmetic number, because the mean of its divisors is an integer number (48274875).

Almost surely, 2^1212601512 is an apocalyptic number.

1212601512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1212601512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1544796000).

1212601512 is an abundant number, since it is smaller than the sum of its proper divisors (1876990488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1212601512 is a wasteful number, since it uses less digits than its factorization.

1212601512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1930 (or 1926 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 1212601512 is about 34822.4282898249. The cubic root of 1212601512 is about 1066.3653752349.

Adding to 1212601512 its reverse (2151062121), we get a palindrome (3363663633).

The spelling of 1212601512 in words is "one billion, two hundred twelve million, six hundred one thousand, five hundred twelve".